What name you can call yourself

There is no U.K. law which specifically says what names you are or aren’t allowed to call yourself. However some names may be illegal, due to other laws.

Names which may be illegal

Names which are not illegal, but you may have difficulty using

About changing your title

You can change your title (i.e. Mr, Mrs, Miss, Ms, etc.) at any time, and you don’t need a deed poll.

You cannot use a deed poll to change your title to “Lord” or any other such title. A title will only be officially recognised if you’re granted the title via official means (i.e. from the Queen, or whatever).